Improvement in time attachments for locks



M. A.`DALT0N. TIME ATTACHMENTS FOB. LOCKS.

Pa'tented Mav 2, 1876 UNITED 'STATES PATENT OFFICE.

MILTON A. DALTON, OF CINCINNATI, OHIO, ASSIGNOR TO THE HALLS SAFE AND LOCK COMPANY, OF SAME PLACE.

IMPRoyEMENi IN TIME ATTACHMENT-s FoR LocKs.

Specification forming part of Letters Patent No. 176,933, dated May 2, 1876; application filed 1 Y March 16,1816. i

To all whom it may concern Be it known that I, MILTON A. DALTON, of Cincinnati, Hamilton county, State of Ohio, have invented an Improvement in Time-Lock Attachments, of Whichthe following is a specijflcation My invention consists-Lin. such an arrangement of parts as `that the time attachment will at all times, when tlielock is not permitted to be opened, throw' the drivin g-pin of one of' the tumblers out of connection with the drive-wheel or bolt-throwing plate ofthe lock,

. A and `at the proper. time willl notdisturb thev connection, andthns permit'the lock yto be opened in the ordinary Way.' l

Figure l is anelevation "of a lock,'exclusive of' tuinblers, embodying lnyrimprovement.

Fig. 2 is a vsection through the tumblers. Fig. 3 is a` perspective view of the tnlnbler ywhich connects with the drive-wheel. y

` A is the bolt of the lock, and B /the gravi rating-dog, which, when down, permits the re- `volving-hook C to engage with its hook!) and throw the bolt. Dis 'the angle-bar which dogs the tumblers, its prpjecting arm d occupying a' position: over the Vtumblers, so that 1- when the tumblers areset to the combination it can fall intov the notches thereof, the Apin d', at the same time. falling into the groove cof thedrive-wheel E, the latterbeing secured to the hub c of the hook C inthe ordinary way. The dog VB and anglebar Dare connected together by the usual- -pin-and-s'lot device F G.

l is the 'spindle of the lock, carrying the hook- C and drivewheel E, the latter having the fly the spring-plate l?, the plate being cut away on its face, as shown at p, to give it the requisite iexibility. It is secured in place, as shown in Fig. 2, and its pin O and the pin M ofthe tumbler' prevent its displacement. [t is provided with a laterally-projecting lip, Q, extending over `the tumbler'L. R is a bellcrank` lever, the arm roi' which is placed in 'connection with a time attachment, so that at the proper time for the opening of the lock the arm r may be permitted to move to the left, as shown in Fi'g. 2. At all other times the bell-crankis held against the pin S by a hook under the arm r, or any other suitable connection with `the clock.

When the bell-crank R is permitted to -swingloosely, or is held in place by a delicate I spring, the entire lock operates in the ordinary way, and can be opened lat any time; but when the bell-crank is held rigidly by the clockyin the position shown in Fig. 2, it is impossible for the drive-Wheel E to adjust thev I tu'mblers, owing to the fact thatV the drivingpin O is attached to the spring-plate P, Which carries the cam-like projection Q, for in operation, when the bell-crank is so held, the projection Q iinpinges against the arm r', so as to force the spring-plate backward, and thus throw'its pin O entirelyr out of connection with the driving-fly l on plate E.

A lock in which one of its tumbler-driving pins is thrown in or out of connection with its.

corresponding iiy by the operation and con nection of al vtime attachment. y

In testimony' of which invention I hereunto set my hand.

f MILTON A. DALTON.

Witnesses: i

EDGAR J. GROSS, -C. B. PARoELLs. 

